A120469 Expansion of a rational g.f., see formula.

1, 5, 34, 240, 1755, 12787, 93549, 683653, 4999040, 36546925, 267210674, 1953631757, 14283593763, 104431164565, 763525632740, 5582346722921, 40814089880858, 298403135454915, 2181708201960095, 15951074407242085

Offset

0,2

Links

Table of n, a(n) for n=0..19.

Index entries for linear recurrences with constant coefficients, signature (0,48,112,-366,-1292,265,3892,2008,-3458,-2902,146,436,48).

Formula

G.f.: -(20*x^12 +184*x^11 +121*x^10 -915*x^9 -1524*x^8 -132*x^7 +1068*x^6 +581*x^5 -71*x^4 -112*x^3 -14*x^2 +5*x +1) / ((3*x +1)*(16*x^12 +140*x^11 +2*x^10 -968*x^9 -830*x^8 +946*x^7 +982*x^6 -239*x^5 -351*x^4 -5*x^3 +39*x^2 +3*x -1)). - Colin Barker, May 17 2013

Crossrefs

Sequence in context: A291027 A033889 A334608 * A180909 A183415 A066559

Adjacent sequences: A120466 A120467 A120468 * A120470 A120471 A120472

Keyword

nonn,easy,less

Author

Roger L. Bagula and Gary W. Adamson, Jul 04 2006

Status

approved